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US 12,120,329 B2Granted
Sub-bitstream extraction-based image coding device and method for scalability
AssigneeLG Electronics Inc.
InventorHendry Hendry
Life of this patent
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Abstract
According to embodiment(s) of the present document, multilayer-based coding can be performed. The multilayer-based coding can include a sub-bitstream extraction process. Inputs of the sub-bitstream extraction process can include a value related to a target OLS index and a value related to a highest temporal identifier.
Claims13
An image decoding method performed by a decoding apparatus, the method comprising:
- obtaining image information from a sub-bitstream;
- decoding a picture being belonging to a layer included in a target output layer set (OLS) for a target OLS index and being related to a highest temporal identifier;
- and
- outputting the decoded picture,
- wherein the sub-bitstream is derived based on sub-bitstream extraction process for a bitstream,
- wherein inputs of the sub-bitstream extraction process includes a value related to the target OLS index and a value related to the highest temporal identifier,
- wherein the sub-bitstream includes a specific network abstraction layer (NAL) unit including information on both the target OLS index and the highest temporal identifier,
- wherein a value of the information on the target OLS index is set based on an input for the sub-bitstream extraction process and a value of the information on the highest temporal identifier is set based on the input for the sub-bitstream extraction process, and
- wherein the specific NAL unit including the information on the target OLS index and the information on the highest temporal identifier is a first NAL unit in an access unit (AU) based on the image information including the AU which contains the specific NAL unit and does not contain an access unit delimiter (AUD) NAL unit.
6 more elements
A non-transitory computer readable storage medium for storing encoded information causing an image decoding apparatus to perform the image decoding method of 1.
A decoding apparatus for performing an image decoding method, the decoding apparatus comprising:
- a bitstream extractor for deriving a sub-bitstream from a bitstream based on a sub-bitstream extraction process and obtaining image information from the sub-bitstream;
- and
- a decoder for decoding a picture belonging to a layer included in a target output layer set (OLS) for a target OLS index and being related to a highest temporal identifier and outputting the decoded picture,
- wherein inputs of the sub-bitstream extraction process include a value related to the target OLS index and a value related to the highest temporal identifier,
- wherein the sub-bitstream includes a specific network abstraction layer (NAL) unit including information on both the target OLS index and the highest temporal identifier,
- wherein a value of the information on the target OLS index is set based on an input for the sub-bitstream extraction process and a value of the information on the highest temporal identifier is set based on the input for the sub-bitstream extraction process,
- wherein the specific NAL unit including the information on the target OLS index and the information on the highest temporal identifier is a first NAL unit in an access unit (AU) based on the image information including the AU which contains the specific NAL unit and does not contain an access unit delimiter (AUD) NAL unit.
4 more elements
A method for transmitting data for image information causing an image decoding apparatus to perform the image decoding method, the image decoding method comprising:
- obtaining image information from a sub-bitstream;
- decoding a picture being belonging to a layer included in a target output layer set (OLS) for a target OLS index and being related to a highest temporal identifier;
- and
- outputting the decoded picture,
- wherein the sub-bitstream is derived based on sub-bitstream extraction process for a bitstream, and
- wherein inputs of the sub-bitstream extraction process includes a value related to the target OLS index and a value related to the highest temporal identifier,
- wherein the sub-bitstream includes a specific network abstraction layer (NAL) unit including information on the target OLS index and the highest temporal identifier,
- wherein a value of the information on the target OLS index is set based on an input for the sub-bitstream extraction process and a value of the information on the highest temporal identifier is set based on the input for the sub-bitstream extraction process, and
- wherein the specific NAL unit including the information on the target OLS index and the information on the highest temporal identifier is a first NAL unit in an access unit (AU) based on the image information including the AU which contains the specific NAL unit and does not contain an access unit delimiter (AUD) NAL unit.
6 more elements
An image encoding method performed by an encoding apparatus, the method comprising:
- obtaining an image;
- encoding the image;
- and
- outputting a bitstream including image information based on the encoding;
- wherein the bitstream includes a specific network abstraction layer (NAL) unit including information on a target output layer set (OLS) index and information on a highest temporal identifier,
- wherein the specific NAL unit including the information on the target OLS index and the information on the highest temporal identifier is a first NAL unit in an access unit (AU) based on the image information including the AU which contains the specific NAL unit and does not contain an access unit delimiter (AUD) NAL unit.
3 more elements
Dependencies are inferred from the claim text.